Update thread annotiation macros in modules to use RTC_ prefix

webrtc/modules/audio_coding/acm2/acm_receiver.h

Index: webrtc/modules/audio_coding/acm2/acm_receiver.h
diff --git a/webrtc/modules/audio_coding/acm2/acm_receiver.h b/webrtc/modules/audio_coding/acm2/acm_receiver.h
index ebeecec7f97cd49f809dbe7ed348d1f12fe5bdb7..93ff89cb68073692f820aad8323da238d8b17395 100644
--- a/webrtc/modules/audio_coding/acm2/acm_receiver.h
+++ b/webrtc/modules/audio_coding/acm2/acm_receiver.h
@@ -269,22 +269,22 @@ class AcmReceiver {
     int sample_rate_hz;
   };
 
-  const rtc::Optional<CodecInst> RtpHeaderToDecoder(
-      const RTPHeader& rtp_header,
-      uint8_t first_payload_byte) const EXCLUSIVE_LOCKS_REQUIRED(crit_sect_);
+  const rtc::Optional<CodecInst> RtpHeaderToDecoder(const RTPHeader& rtp_header,
+                                                    uint8_t first_payload_byte)
+      const RTC_EXCLUSIVE_LOCKS_REQUIRED(crit_sect_);
 
   uint32_t NowInTimestamp(int decoder_sampling_rate) const;
 
   rtc::CriticalSection crit_sect_;
-  rtc::Optional<CodecInst> last_audio_decoder_ GUARDED_BY(crit_sect_);
-  rtc::Optional<SdpAudioFormat> last_audio_format_ GUARDED_BY(crit_sect_);
-  ACMResampler resampler_ GUARDED_BY(crit_sect_);
-  std::unique_ptr<int16_t[]> last_audio_buffer_ GUARDED_BY(crit_sect_);
-  CallStatistics call_stats_ GUARDED_BY(crit_sect_);
+  rtc::Optional<CodecInst> last_audio_decoder_ RTC_GUARDED_BY(crit_sect_);
+  rtc::Optional<SdpAudioFormat> last_audio_format_ RTC_GUARDED_BY(crit_sect_);
+  ACMResampler resampler_ RTC_GUARDED_BY(crit_sect_);
+  std::unique_ptr<int16_t[]> last_audio_buffer_ RTC_GUARDED_BY(crit_sect_);
+  CallStatistics call_stats_ RTC_GUARDED_BY(crit_sect_);
   const std::unique_ptr<NetEq> neteq_;  // NetEq is thread-safe; no lock needed.
   const Clock* const clock_;
-  bool resampled_last_output_frame_ GUARDED_BY(crit_sect_);
-  rtc::Optional<int> last_packet_sample_rate_hz_ GUARDED_BY(crit_sect_);
+  bool resampled_last_output_frame_ RTC_GUARDED_BY(crit_sect_);
+  rtc::Optional<int> last_packet_sample_rate_hz_ RTC_GUARDED_BY(crit_sect_);
 };
 
 }  // namespace acm2